JSON data dictionary generator: read json file, collect the key paths, write out report

json_data_dictionary.js

#!/usr/bin/env node

//var JSON = require('JSON');
var fs = require('fs');
var argv = require('yargs').argv;

var isObject = function(v) { return v && (typeof v==='object') && !('length' in v); };
var isArray = function(v) { return v && (typeof v==='object') && ('length' in v); };
var isPrimitive = function(v) { var res=(typeof v in {'boolean':true,'number':true,'string':true,'undefined':true}) || (v===null); return res;};
var keys = function(v) {keys=[]; for(var key in v){keys.push(key)} return keys};

function getJSONKeyPaths(v, result, keyPath, superFlat) {
    result = !result ? [] : result;
    keyPath = !keyPath ? [] : keyPath;
    if(isArray(v)) {
        for(var i=0; i<v.length; i++) {
            getJSONKeyPaths(v[i], result, keyPath.concat(superFlat ?'*' :i), superFlat);
        }
    } else if(isObject(v)) {
        for(var k in v) {
            getJSONKeyPaths(v[k], result, keyPath.concat(k), superFlat);
        }
    } else {
        var endPoint = keyPath.join('.') + ' = ' + (superFlat ?typeof(v) :JSON.stringify(v));
        result.push(endPoint);
    }
}

// Run from CLI (i.e. not invoked via gulp)
if(require.main === module) {
    if(!argv.pathname) {
        console.log("Usage-\n$ ./jslib/json_data_dictionary.js [--values=(true|false)] "+
                    "--pathname=/path/to/blob.json\n    Where --values=false squashes "+
                    "key paths to the most minimal.");
    } else {
        var res=[];
        var testJSON = JSON.parse(fs.readFileSync(argv.pathname, 'utf-8'));
        getJSONKeyPaths(testJSON, res, [], !JSON.parse(argv.values ?argv.values :'false'));
        console.log(res.join('\n'));
    }
}